headwater 中文意思是什麼

headwater 解釋
河流的源流
  1. In arid climates, surface water is generally better than ground water in headwater areas, but poorer downstream.

    在乾旱氣候的上游區，地表水一般較地下水好，但下游的地表較差。
  2. The first geologic reason for degeneration of the eco - environment in the headwater area of the yellow river is that the increase of the recent geologic function caused desertification and grasslands resource decreased and underside changed, destroied the balance of water - air - heat in the area ; the second is that the water environment changes by the degradation and atrophy of frozen earth cause multilayer and synthesis cause of formation degeneration of the eco - environment ; the third is that the man and rats function accelerated degeneration of the eco - environment in the headwater area of the yellow river

    摘要黃河源區生態環境惡化的地質原因之一是現代地質作用增強，形成以荒漠化為主的草地資源退化與下墊面改變，地區水氣熱平衡破壞；二是因凍土退化、萎縮，引起水環境變異，導致多層面與綜合成因的生態環境惡化；三是人為及鼠類活動對源區生態環境惡化起著推波助瀾的作用。
  3. It divides the main vegetation of the headwater region of huangpu river into 4 categories based on field survey and observation and methods of factor analysis and systematic cluster analysis and according to the degree of soil and water conservation function : deciduous trees and shrubs are category 1 which shows very strong soil and water conservation function ; tea plantation, grasslands and pine trees are category 2 which has stronger function ; the category 3 is moso bamboos and broadleaved evergreen trees which have stronger permeability and erodibility, but the permeable performance is not outstanding, the capacity of soil moisture storage common and soil and water conservation function moderate and ; the category 4 is uncovered land where the soil and water conservation function is very weak and its permeability, erodibility, erosive resistance and soil moisture storage capacity are all notably smaller than that of the other lands

    摘要在野外調查、實測的基礎上，採用因子分析、系統聚類分析的方法，根據土壤層水土保持功能的強弱，將黃浦江源區主要植被類型分為4類：落闊林、灌木林為第一類，表現出很強的水土保持功能；茶園、草地、松林為第二類，土壤水土保持功能較強；毛竹林、常綠闊葉林表現出較強的抗蝕性和抗沖性，但滲透性能並不突出，土壤貯水能力也一般，水土保持功能中等，為第三類；裸露地水土保持性能很差，單獨作為第四類，其滲透性、抗蝕性、抗沖性、土壤水庫容都顯著小於其他各樣地。
  4. Establishment of management tables system for water amp; amp; soil conservation and headwater conservation forest

    水源涵養林經營數表編制系統的研製
  5. Abstract : to improve water quality of a running water plant, headwater of which is the fuyang river in handan city. using bone glue as a coagulant, the static and unstatic experiments are carried out, the optimum bone glue dosage is found out

    文摘:針對邯鄲市滏陽河水的水質特點及地表水廠的現狀，在不進行大規模的土建改造和大幅度提高運行費用的前提下，採用骨膠作為助凝劑，進行靜態實驗和動態實驗，尋找出骨膠的最佳投量范圍，達到了改善水質的目的。
  6. On the basis of suzihe watershed in dahuofang reservoir headwater, the problems of land and water resources utilization and management are analyzed and countermeasures are advanced in order to insure the headwater can offer the reservoir with good environment, support the reservoir ' s normal function and the whole watershed ecological environment system ' s benign circulation

    以大夥房水庫水源涵養區蘇子河流域為例，分析目前蘇子河流域水土資源開發利用和管理中存在的問題，並提出相應的對策，以確保涵養區為水庫提供良好的水源涵養環境，維護水庫功能的正常發揮，推動整個流域生態環境系統的良性循環。
  7. It will lengthen as a result of headwater erosion and, thereby, will cut a valley through both hard and soft rock.

    由於向源侵蝕的結果，它不斷延長並且穿過軟硬巖石從中切出一條河谷來。
  8. The results showed that the fractal dimensions of the main stream and down stream gauging staitions were higher those that of the tributary, headwater gauging stations

    結果顯示，同一流域幹流的日徑流過程分維值要明顯大於支流的分維值，下游大於上游， 4個水文站分維值年際變化趨勢基本保持一致。
  9. The paper introduces and amends the composite indexes of soil erosion intensity and regional soil erosion intensity and conducts quantitative analysis on spatial relationship of types of land use and soil erosion intensity of whole china territory, the middle and lower areas of liaohe river, headwater area of danjiangkou reservoir of south - north water transfer project of hubei part and 4 regions of huidong county in guangdong based on sum up of general study methods of spatial relationship of land use and soil erosion

    摘要在總結土地利用與土壤侵蝕空間關系一般研究方法的基礎上，引入並修正了土壤侵蝕強度綜合指數和區域土壤侵蝕強度綜合指數，時整個中國境內、遼河中下游地區、南水北調丹江口水庫水源區湖北部分和廣東省惠東縣4個區域土地利用類型與土壤侵蝕強度空間關系進行了定量比較分析。
  10. Conclusion : water quality of the headwater is bad

    結論：該市農村水源水水質差。
  11. Study on runoff forecast of baihe river basin in headwater region of the yellow river

    黃河源區白河流域徑流預報研究
  12. The research of the subject had study thoroughly the using situation of the water and soil of ejina oasis in the downstream of the inland river in the arid area. and it had get the experience and test of the use of water and soil through study the past material. and it had make it known that the decrease of the runoff volume from headwater, the excessive cultivation area and serious waste of water are reasons for desert soil and ecotope deterioration

    本文在對位於乾旱區內陸河下游的額濟納綠洲水土資源開發利用現狀，進行全面研究的基礎上，總結了近五十年額濟納綠洲水土資源開發利用的經驗和教訓，找出了存在的問題：上游來水減少，過度開墾，水資源浪費嚴重，土地荒漠化加劇，生態環境惡化。
  13. According to the requirements of sustainable development in the headwater region of xiaofu river, the groundwater pumping is planned using the optimal control model

    最後直接根據淄博市孝婦河源頭地區地下水資源的可持續利用需求，建立了該區的地下水最優控制模型，並求得了最優解。
  14. A study of the geological environmental of suprapermafrost water in the headwater area of the yellow river

    黃河源區凍結層上水地質環境影響研究
  15. Study on soil and water conservation function of main vegetation category soil in headwater region of the huangpu river

    黃浦江源區主要植被類型土壤水土保持功能研究
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